Clutch type friction catch



Aug. 26, 1952 H, L 2,607,949

CLUTCH TYPE FRICTION CATCH Filed March 4, 1546 Patented Aug. 26, 1952 STATES PATEN CLUTCH Tire FRICTION CATCH Hyl'and Lyon, Los Angeles, Calif. Application March 4, 1946, Serial No. 651,758

tration my invention istutilized as an expansible. hinge pin for imposing a frictional "drag cr re.

sistanceto the freerotation of thesaidhinge elements around or with relation to said'hinge:

pinortoeach other;

It is therefore an. .o'bjectof this invention to provide a: clutch. which incorporates a pin or shait upon which it is positioned or. which-forms.

an. expansible friction element and upon which frictional. element the means for relative. rotation'arecarried. and a means for expanding the sleeve or shaft from: within to determine the frictional resistanceto relative rotation of the. elements carried thereby;

Another object of this invention isto provide 4 Claims. (01. 16 -140) a'clutch including a split sleeve element adapted tobe mounted within a journal and within which split sleeve there is positioneda screw means having relatively flat tapered threads which may or may not increase in diameter toward the head of the screw and adapted to be threaded into. the. sleeve. to expand the sleeve within the. journal to determine the frictional resistance to rotation of the sleeve and journal.

Other objects and advantages of my invention it is believed will be apparent to those skilled in this art from the hereinafter contained description of my invention as illustrated in the accompanying drawings, in which.

Figure 1 is a top plan View of a hinge'construction incorporating, the clutch embodying my; invention; I V

Figure 2 is a sideelevation principally inv vertical mid-sectionthereof.

Figure 3 is a detached side elevation partly in half section of a modified form of hinge; pin or clutch embodying my invention.

As my invention is illustrated in the accompanying drawings, the clutch is shown as an expansibl-e hinge pin of a hinge. The hinge includes the relatively rotatable hinge members I and 2 having overlapping eye sections 3, 3 and 4, 4 through which the hinge pin or clutch element 5 is passed.

The clutch element 5 may be of the construction illustrated in Figures 1 and 2, or in Figure 3, or any suitable modification thereof, and in the form illustrated in Figures 1 and 2 includes a sleeve 6 which is.-longitudinally split as man cated at 1; Prior to splitting of the-sleeve: 6 it.

is-threaded at its opposed ends asindicated. at B.

and 9.- r r The threads are of-fsawtooth profile forming a series'of tapered'wedging surfaces togivethe efiectfiof multiple. helical: cones. The-threads as a whole, however,- ;do nottaper, that is; the pitch diameter remains constant. Likewise the pitch: itself is constant. r v

The expansion elements are in the form f; screws I2 and I3 having heads l4 and l5 .;respe ctively, The threads of the screws |2-and.--l3.-mate with the threads 8 and 9; The threadsgof, the

. screws 12. and I3- have constant pitchgdiameter and form helicalcone Wedging surfaces-whichconform, to and are parallel with the wedging; surfaces of the threads 8 and 9. v

The expansion elements or screws. l2 1and 3: form a free runningfit with the matinggthreads. 8 and 9 until the heads l4 and I5 bear against the extremities of the sleeve whereupon axial. movement between the screws l2 and I3 andthe; sleeve 6 is prevented. On further forced rela-s tivev rotationbetween the screws 12 and- I3 and thesleeve 6, the helical-conical wedgingv surfaces of the threads 8 and 9 ride up over: the mating wedging surfaces of the screws l2;and [3' causingthetwo series of wedging surfaces. to as.- sume different positions axially of oneanot-hen, and thereby to cause-radial expansion 0fthe sleeve 6. It will be observed that the sjlopeof the w-edgingor helical-conical surfaccSis-relatively' gradual, so. that a Iarge -JQldiaLor-eXpanding force maybe. egertedi g ;Furthermore, it will be observed; that; :relative axial displacement of the wedging surfaces causes the. sleeve toexpand uniformly throughout its length.

In order to adjust the positionof the screws 12 and I3 their heads l4 and I5 are provided with suitable sockets 20-to receive a wrench. In the. modified form of, my invention-illustrated inFigure 3, the clutch member 5 iS2i1111S- trated as being formed-of a. solid pin 2l-having reducedend sections ZZ 'and 23; upon which 5 the split sleeves 24 and 25 are positioned. The short sleeve sections '24 and 25 are split longitudinally and are of substantially the same external diameter as the pin 2]. This permits the pin to be slipped through the complementary eyes 3 and 4 of a hinge structure. The split sleeves 24 and 25 are internally threaded as indicated at 26 with threads of sawtooth profile to form helical-conical wedging surfaces as in the first described structure.

28 in the manner of the first described structure. The expansion of the sleeves in diameter withinthe journals provided by the eyes 3 and 4 increases the frictional resistance to relative rotation of the hinge elements around the hinge pin. The sleeves 24 and 25 are provided with.

wrench sockets at their outer ends 21 into which a suitable socket wrench may be fitted,"

and a lock washer 3| having suitable projections '32 is p rovided which fits within the wrench sockets 3010f the sleeves 24 and 25 and into corresponding wrench sockets 33 formed in the ends of the pin sections 22 and 23, respectively, to lock the sleeves in their adjusted positions.

Havirig'fully described my 'inven'tion, it is evident that the clutch of my invention isnot limited to use as a hinge pin but is 'of wide and -ex-\ tended applicability where a quicklyadjusted. finely controlled clutch or gripping'ineans is da sii-ed. v 1

mam: r Y 111A clutch involving: a split sleeve adapted to fit withina journal; 2, pin adapted to fit within said-sleeve; mating screwthread elements in the confronting surfaces of said sleeve and pin, said screwthread elements having a profile defining a series of wedging surfaces interrupted by shoulders, said screwthread elements having constant pitch and pitch diameter and s0 related as to provide normally a running fit between said sleeve and pin; said pin and sleeve having coacting'abutments adapted upon engagementto prevent axial movement between said pin and sleeve and adapted upon forced relative rotation of said pin and sleeve to cause one of said series of wed ingsurfaces' to ride up over said other series of wedgifig surfaces whereby the two series of wedging' fsur faces of'said screw thread elementsassume different positions axially of one another thereby to effect uniform expansion of said sleeve in said journal. f

' :2.- A clutchincluding: a stem having a reduced portion; a split sleeve fittingover said reduced portion; screwthread elements in the confronting surfaces of said reduced portion and sleeve; said screwthread elements having a profile defining a series of wedge surfaces interrupted by shoulders; said 'screwthread elements having'constant pitch diameter and being so related as'to. provide a running fit between said reduced portion and said sleeve; said stem-forming an abutment engageable by 1 said sleeve whereby on engagement axial movement between said reduced portion and said sleeve is prevented '4 and on forced relative rotation of said reduced portion and said sleeve one of said series of wedge surfaces is caused to ride up over said other series of wedge'surfa-ces whereby the two series of wedge surfaces of said screw thread elements as sume different positions axially of one another thereby to expand said sleeve.

3. A clutch including: a stem having a reduced portion; a split sleeve fitting over said reduced portion; screwthread elements the confronting surfaces of said reduced portion and sleeve, said screwthread elements having a profile defining a series of wedge surfaces inter- "rupted by shoulders, said screw thread elements having constant pitch diameter and being so related as to provide a running fit between said reduced portion and said sleeve; said stem forming an abutment engageable by said sleeve where-, by on engagement axial movement between said reduced portion and said sleeve is prevented and on forced relative rotation of said reduced portion and said sleeve one of said seriesiof' wedge surfaces is caused to rideup over-said other series of wedge surfaces whereby the two series ofwedge surfaces of said screw thread elements assume different positions axially of oneanother thereby to expand said sleeve; said stem and said sleeve having in. their extremities a series of notches; and a locking member having lugs adapted to fit in said notches to secure said sleeve in' various positions relative to said stem.

4. In a device of the class described: a split sleeve; a headed pin fitting each end of said sleeve; said pins and the extremities of said sleeve having mating helical-conical wedging surfaces defining a sawtooth profile and permitting a run-- ning fit between said pins and sleeve; the heads of said pins adapted to abut the extremities of said sleeve to prevent axial movement between said sleeve and said pins and on forced relative rotation of said sleeve and pins to cause one of said helical-conical wedging surfaces to ride up over said other helical-conical wedging surface whereby the two helical-conical wedging surfaces assume differing positions axially of one another thereby to expand said sleeve. r HYLAND LYON.

REFERENCES CITED France Jan. 4, 1922 

